Product Description
Leroy Somer R 438 Automatic Voltage Regulator (AVR)
The Leroy Somer R 438 Automatic Voltage Regulator (AVR) is a high-performance electronic component engineered to provide precise and reliable voltage control for industrial alternators. Designed primarily for use with AREP or PMG excitation systems, this AVR ensures optimal generator stability even under fluctuating load conditions. The unit is built for maximum durability and efficient thermal management, featuring a robust aluminum heatsink and a large blue electrolytic capacitor. It offers flexible installation with clearly marked terminal blocks (X1, X2, Z1, Z2, E+, E-) and supports multiple voltage sensing inputs (0V, 110V, 220V, 380V). Additionally, it includes a red control relay and a built-in 6A fuse holder for enhanced circuit protection, making it an essential and dependable replacement for maintaining your power generation equipment.
Technical Specifications:
- Brand: Leroy Somer
- Model: R 438
- Voltage Sensing Terminals: 0V, 110V, 220V, 380V AC
- Connection Terminals: X1, X2, Z1, Z2, E+, E-
- Circuit Protection: Built-in fuse holder rated for 6A
- Cooling System: Integrated aluminum heatsink

Leroy Somer R 438 Automatic Voltage Regulator (AVR)
Ensure stable power generation with the Leroy Somer R 438 Automatic Voltage Regulator (AVR). Designed for AREP and PMG alternators, this reliable electronic AVR features multi-voltage sensing (110V-380V), robust heatsink cooling, and 6A fuse protection to keep your industrial generator running at peak performance.



